WITH MILD TEMPERATURES AND AN INCREASE IN MOISTURE OUT AHEAD OF
AN APPROACHING SURFACE LOW...LIGHT RAIN OR DRIZZLE...AND FOG WILL
DEVELOP ACROSS MUCH OF NORTHERN ILLINOIS AND NORTHWEST INDIANA
THIS EVENING. THIS SURFACE LOW WILL THEN MOVE EAST THROUGH THE
AREA OVERNIGHT TONIGHT WITH AN ASSOCIATED COLD FRONT USHERING IN
MUCH COLDER AIR...PROVIDING A TRANSITION TO A WINTRY MIX AND THEN
SNOW ON TUESDAY.
CURRENT INDICATIONS ARE THAT THIS LIGHT RAIN OR DRIZZLE MAY CHANGE
TO LIGHT FREEZING RAIN FOR FREEZING DRIZZLE FOR A SHORT TIME
TONIGHT AND VERY EARLY TUESDAY MORNING FOR AREAS NORTHWEST OF A
LINE FROM APPROXIMATELY LASALLE TO THE NORTHERN CHICAGO SUBURBS.
OTHERWISE A TRANSITION FROM RAIN TO ALL SNOW IS EXPECTED TO OCCUR
FROM NORTHWEST TO SOUTHEAST THROUGH MID MORNING TUESDAY FOR ALL
AREAS IN NORTHERN ILLINOIS AND NORTHWEST INDIANA. BEFORE THE SNOW
ENDS TUESDAY AFTERNOON...A FEW INCHES OF ACCUMULATION CAN BE
EXPECTED...ESPECIALLY NORTH OF INTERSTATE 80 WITH THE HIGHEST
AMOUNTS EXPECTED NEAR THE WISCONSIN BORDER. NORTHWEST WINDS WILL
INCREASE TUESDAY MORNING WITH GUSTS TO AROUND 30 MPH AT
TIMES...ESPECIALLY NEAR LAKE MICHIGAN...CAUSING BLOWING SNOW.
DETAILS REGARDING FREEZING RAIN POTENTIAL AND SNOWFALL AMOUNTS
WILL CONTINUE TO BE REFINED AND PERSONS PLANNING TRAVEL ACROSS THE
REGION LATE TONIGHT AND TUESDAY SHOULD CLOSELY MONITOR LATER
FORECASTS AND STATEMENTS.
